Using indices, how to solve
1) 3^y + 3^y+2 = 90
2) 2^r+4 - 2^t =120

Cthe residual plot for model 1 has a non random pattern and is a good fit for the data

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho

It took off from 11 degrees